Pearsons’ correlation coefficient between dust model and the extinction curve parameters c1, c2, c3, c4 of Eq. (2) and RV for various LIPS sub-samples.
Notes. Strong correlations or strong anti-correlations are marked in bold. q is the exponent of the dust-grain size-distribution, r+ is the upper radius of large silicates. and are the mean radius of large silicates and carbon grains, respectively, mvsg∕mlg and are the mass ratios of the very small to large grains and of total silicate to carbon, respectively. Samples are defined as follows. – S-sample: single-cloud sight-lines (Table 1; HD 210121 is excluded in the correlation study with extinction parameters but is considered in RV). – M-sample: multiple-cloud sight-lines, including 24 stars of Table 1. The M-sample has a narrower range in the observed extinction characteristics than the S-sample. – L-sample: LIPS objects that are not single-cloud sight-lines, including 51 stars. –LS -sample: targets that are not seen through single-cloud sight-lines (i.e., that belong to the L-sample), but with extinction parameter range similar to the S-sample. This sample includes between 47 and 51 stars.
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